@Will_Wang It appears that Redraw is not required.
Contrary to my earlier comment, Python can turn off Isocurves for solids too.
From other advice https://discourse.mcneel.com/t/grasshopper-guid-input/211740/2 it appears that GH Python does not have access to the GUID of objects which are created within GH.
I have attached working Python scripts which operate within Rhino to:
Create a box.
Turn off the isocurve for a selected object.
Create a box and turn off its isocurve.
Given the lack of access o the GUID, I will reconsider the use of GH. I will consider a Rhino Python solution without GH.
Thank you for your help.
Regards, Garry.
AddBox.py (1.1 KB)
IsocurveOff.py (451 Bytes)
AddBoxNoIsocurve.py (660 Bytes)